doctor with model of human anatomy of rectum and hemorrhoids in hospital and ultrasound inflamed vascular structure

abdomen anatomy anus body bowel cancer care clinic colon constipation diagnosis digestion digestive disease doctor examination fissure gastrointestinal health healthcare hemorrhoid hospital human inflamed inflammation internal intestinal intestine medical medicine model organ pain patient physician prevention problem proctologist rectal rectum science specialist structure surgeon surgery system tract treatment ultrasound vascular